DOI: 10.1002/2016GL068167
论文题名: Postseismic gravity change after the 2006-2007 great earthquake doublet and constraints on the asthenosphere structure in the central Kuril Islands
作者: Han S.-C. ; Sauber J. ; Pollitz F.
刊名: Geophysical Research Letters
ISSN: 0094-9112
EISSN: 1944-8843
出版年: 2016
卷: 43, 期: 7 起始页码: 3169
结束页码: 3177
语种: 英语
英文关键词: earthquake
; GRACE gravity
; viscoelastic relaxation
Scopus关键词: Climate change
; Earthquakes
; Geophysics
; Locks (fasteners)
; Viscoelasticity
; Elastic thickness
; Gravity recovery and climate experiments
; Great earthquake
; Large earthquakes
; Rheological property
; Subduction zones
; Tectonic deformations
; Viscoelastic relaxation
; Faulting
英文摘要: Large earthquakes often trigger viscoelastic adjustment for years to decades depending on the rheological properties and the nature and spatial extent of coseismic stress. The 2006 Mw8.3 thrust and 2007 Mw8.1 normal fault earthquakes of the central Kuril Islands resulted in significant postseismic gravity change in Gravity Recovery and Climate Experiment (GRACE) but without a discernible coseismic gravity change. The gravity increase of ∼4 μGal, observed consistently from various GRACE solutions around the epicentral area during 2007-2015, is interpreted as resulting from gradual seafloor uplift by ∼6 cm produced by postseismic relaxation. The GRACE data are best fit with a model of 25-35 km for the elastic thickness and ∼1018 Pa s for the Maxwell viscosity of the asthenosphere. The large measurable postseismic gravity change (greater than coseismic change) emphasizes the importance of viscoelastic relaxation in understanding tectonic deformation and fault-locking scenarios in the Kuril subduction zone. © 2016. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84979469479&doi=10.1002%2f2016GL068167&partnerID=40&md5=7e5ee2eff7bc6201e3e561212fb8cd98
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/10075
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: School of Engineering, University of Newcastle, Callaghan, NSW, Australia
Recommended Citation:
Han S.-C.,Sauber J.,Pollitz F.. Postseismic gravity change after the 2006-2007 great earthquake doublet and constraints on the asthenosphere structure in the central Kuril Islands[J]. Geophysical Research Letters,2016-01-01,43(7).